Efficient Approach to 4-Sulfonamidoquinolines via Copper(I)-Catalyzed Cascade Reaction of Sulfonyl Azides with Alkynyl Imines
作者:Guolin Cheng、Xiuling Cui
DOI:10.1021/ol400219n
日期:2013.4.5
A novel and efficient approach to 4-sulfonamidoquinolines via copper-catalyzed cascade reaction of sulfonylazides with alkynyl imines has been developed in which a 1,3-dipole cycloaddition/ketenimine formation/6π-electrocyclization/[1,3]-H shift cascade reaction was involved. Various 4-sulfonamidoquinolines were afforded in up to 84% yield for 19 examples. This synthetic strategy features with atom
Unexpected Domino Reaction via Pd-Catalyzed Sonogashira Coupling of Benzimidoyl Chlorides with 1,6-Enynes and Cyclization To Synthesize Quinoline Derivatives
A domino reaction via palladium-catalyzed Sonogashira coupling of benzimidoyl chlorides with 1,6-enynes and then cyclization to form quinoline derivatives has been developed. The reaction conditions and the scope of the process are examined, and a plausible mechanism is proposed. The procedure is simple, rapid, and general, and the substrates are readily available.
Flash-vacuumpyrolysis of N-(2,3-diphenylazirin-3-yl)dihydrobenzoxainones leads to transient N-azirinyl- and N-indolylazaxylylenes which give 2-arylindoles (5) and dihydroindoloquinolines (8) respectively. 5H-1,4-Benzodiazepines are implicated as the precursors to the indoles via the methylene nitrile ylides (9) and an alternative route to the latter by flash pyrolysis of N-(2-methylphenyl)benzimidoyl
Potential antitumor agents. 47. 3'-Methylamino analogs of amsacrine with in vivo solid tumor activity
作者:Graham J. Atwell、Bruce C. Baguley、Graeme J. Finlay、Gordon W. Rewcastle、William A. Denny
DOI:10.1021/jm00159a035
日期:1986.9
antileukemic agent amsacrine with a 3'-methylamino group provides a compound (3) with a broader spectrum of action, including in vivo activityagainst experimental solidtumors. The synthesis, physicochemical properties, and biological activity of a series of acridine-substituted analogues of 3 are described. The compounds show higher levels of DNA binding, water solubility, and in vivo solidtumor activity
Transformation of Amides to Thioamides Using an Efficient and Novel Thiating Reagent
作者:Mohamed S. Gomaa、Gaber El Enany、Walid Fathalla、Ibrahim A. I. Ali、Samir. M. El Rayes
DOI:10.3390/molecules27238275
日期:——
convenient protocol was developed for the transformation of N-aryl-substituted benzamides to N-aryl-substituted benzothioamides using N-isopropyldithiocarbamate isopropyl ammonium salt as a novel thiating reagent. The major advantages of this protocol are its one-pot procedure, short reaction times, mild conditions, simple work-up, high yields and pure products.